Fire-resisting asphalt or like hydrocarbonaceous material



resumes s estlwyt Foe Mis'lmfi am UNITED s JAMES HOWARD YOUNG, OF PITTSBURGH, PENNSYLVANIA, ASSIGNOR TO K. H. ROBERTSON COMZPANY, 0F PITTSBURGH, PENNSYLVANIA, A. CORPORATION OF PENNSYLVANIA.

- rmn-nnsrsrmo ASPHALT on.

No Drawing.

To all whom it may concern Be it known that I, JAMES Howano Yoimo, a citizen of the United States, residing in Pittsburgh, in the county of Allema 'gtrictly speaking, compounds of the hy-.

drocarbon class are more or less inflamma-' ble, as any of them will char or burn if heated long enough and at a temperature sufficiently high, but it is possible to render asphalt, tar, pitch, bitumens and like hydrocarbonaceous materials so highly resistant to. flames as to permit them to be characterized as practically non-inflammable inasmuch as they can be so modified that their rate of combustion and the heat produced is such that their kindling temperature is not spontaneously or, inherently maintained and consequently combustion will proceed only when heat is supplied from an external source. j

To illustrate: If a part of an area covered with the modified asphalt should be heated, only that part located in the heated zone would char, as the flame would not be carried by the modified asphalt to a part outside of the heated zone, and in this sense the term non-inflammable is herein used.

Ordinary asphalt, tar, pitch, bitumens and like hydrocarbonaceous materials in general are being used in increasing quantities for purposes ,where it is highly desirable that the asphalt or the like should possess non- "infiammable qualities, such as in roofing products, etc. Heretofore the tendency of asphalt and the like to burn has been reduced by incorporating therewith inert non-combustible material, such as sand,chalk, slate, iron oxid, etc., and by products with such materials.

For some purposes, it is not desirable to have a large quantity of these inert mate- Speciflcation of Letters Patent.

LIKE HYDROCARBONAOEOUS MATERIAL.

rials" either incorporated with or surfaced on the asphaltic product, in which case it is 1 -SEARCH Room TATES PATENT OFFICE.

Patented Dec.6,1921., I Application'filed April 16, 1920. Serial No. 374,384.

ance with the present'invention by inco l porating wih the as phalt, tar, pitch or t e do like W en 1n..a A will flux therewith, which is volatile at the relatively high temperature of 250 C. or over and gives oil vapors which are noncombustible within the ordinary meaning of the term, which dilute the combustible vapors from the asphalt so that the latter is rendered inherently incapable of supporting a flame, and which will not decrease the weather-resisting or other desirable properties of the asphalt.

A suitable material for use as a modifier of the asphalt and the like is a halogen substitution product of naphthalene, and I prefer to use the chlorin substitution product on account of its relatively lower cost.

mien the halogen is combined in the ring orclosed chain of naphthalene, the resulting compound is very stable, will not hydrolyze at ordinary temperatures to any appreciable extent and has no detrimental action on steel.

The chlorin substitution products may be produced by subjecting melted naphthalene under pressure to the action of chlorin gas. The chlorinated products are subsequently washed with an alkali to neutralize the hydrochloric acid present, after which they are distilled.

The chloro-naphthalene products which I have foundto'be most effective are the solid more highly chlorinated ones.

The percentage of the chloro-naphthalene used in the asphalt or the like may vary as 1T5 a material which About 30% of a solid chloro The improved or modified asphaltic or! I like hydrocarbonaceous material may be employed for all uses to which the untreated asphaltic or like materials are now used with the distinct a 5 hazard by such use, other advantages of especially for I claim:

dvantage of reducing the fire without diminishing the the asphalt and the like, building purposes.

1. A new composition of matter consisting 10 of bituminous material having incorporated therewith chloro-naphthalene products.

2. A new composition of matter consisting JAMES HOWARD YOUNG.

that the resulting ,composi- 15 r 

